giving the cat some milk

When a man pumps his cum into a girls pussy, it's called giving the cat some milk
For example:

Guy 1: Bro you need to prepare for december! Go watch that video where
Johnny Sins is giving the cat some milk

Guy 2: Ah thanks bro! ( ͡° ͜ʖ ͡°)
Guy 1: no problem.

- Milk deliverer gang